-er -th c-- ccc ccd cce cch ccr cct cdc cdd cde cdh cdr cdt ce- cec ced cee ceh cer cet ch- chc chd che chh chr cht crc crd cre crh crr crt ctc ctd cte cth ctr ctt dcc dcd dce dcr dct ddc ddd dde ddh ddr ddt de- dec ded dee deh der det dh- dhc dhd dhe dhh dhr dht drc drd dre drr drt dtc dtd dte dth dtr dtt ec- ecc ecd ece ech ecr ect ed- edc edd ede edh edr edt eec eed eee eer eet ehc ehd ehe ehh ehr eht erc erd ere erh err ert etc etd ete eth etr ett hcc hcd hce hch hcr hct hdc hdd hde hdh hdr hdt he- hec hed hee heh her het hhc hhd hhe hhh hhr hht hr- hrc hrd hre hrh hrr hrt htc htd hte hth htr htt rcc rcd rce rch rcr rct rdc rdd rde rdh rdr rdt re- rec red ree reh rer ret rh- rhc rhd rhe rhh rhr rht rrc rrd rrh rrr rrt rtc rtd rte rtr rtt tcc tcd tce tch tcr tct tdc tdd tde tdh tdr tdt te- tec ted tee teh ter tet th- thc thd the thh thr tht trc trd tre trh trr trt ttc ttd tte tth ttr ttt